Question

which triangle is equilateral?

Explanation:

Step1: Recall equilateral - triangle definition

An equilateral triangle has three equal - length sides and three equal angles (each 60°).

Step2: Examine the triangles visually

Look for a triangle with all sides appearing of equal length.

Answer:

The triangle with all sides of equal length (usually appears as a regular - looking triangle) is the equilateral triangle. Without specific labels on the triangles in the image, we can't point to a particular one by number or letter, but it's the one that looks symmetric with all sides congruent.